• KOMUNHWA
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• no.64
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• pp.7-28
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• 2004

The purpose of this study is to examine the importance of public education in archaeology and various educational methods to educate the general public about archaeology itself and the importance of the protection and management of archaeological sites. T

• Proceeding of EDISON Challenge
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• 2012.04a
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• pp.9-12
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• 2012

현재 각 나라에서 고고도 무인항공기에 대한 관심이 높아지고, 우리나라 또한 여러 가지 형상의 고고도 무인항공기를 개발하기위해 노력하고 있다. 본 연구에서는 고고도 무인항공기에 사용되는 에어포일의 공력특성을 EDISON_CFD를 이용하여 분석하였다. 현재 개발된 고고도 무인항공기 중 글로벌 호크를 선정하여 그 주 날개의 Airfoil을 해석모델로 선정하고 항공기 운항시 고도 조건을 적용하여 공력특성을 분석하였다. 받음각의 범위는 $2^{\circ}{\sim}10^{\circ}$로 설정하였고 $C_l$ 및 $C_d$ 값을 계산하여 공력 특성 곡선($C_l$, $C_d$, $C_d-C_l$)을 구성하였다.

• The Journal of Korean Association of Computer Education
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• v.20 no.1
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• pp.49-62
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• 2017

This paper aims to deeply investigate the interactive patterns between a robot teacher and a participating gifted student who assembled GoGo Bumper car and controlled it with GoGo Monitor commands. Two days of classroom activities for the GoGo Bumper car project were videotaped between July 29 and 30 in 2013. Extra video-based recall interviews were also conducted three times between Nov 2013 and Jan 2014. The qualitative analysis of video data, GoGo Monitor codes and interview data revealed several unfolding patterns of computational thinking. The participating student while interacting with a robot teacher often contemplated and coded on his own ways as he worked with GoGo board testing and assembling a GoGo Bumper car. The overall process of coding and testing his own ideas by finding out relevant commands and arranging them attuned to his computational strategies seems to be cyclic.

• 한국항공운항학회:학술대회논문집
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• 2015.11a
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• pp.55-58
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• 2015

고고도 장기체공 무인기는 일반적인 무인기와 달리 고고도에서의 환경과 장시간의 체공에 따른 위험도가 높을 수밖에 없다. 따라서 신뢰도를 높이기 위한 다양한 방안을 강구해야 한다. 가장 중요한 요소 중 하나가 비행제어시스템이며, 본 논문에서는 비행제어시스템의 이중화에 따른 설계결과와 비행시험결과를 기술하였다.

• The Journal of the Korea Contents Association
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• v.8 no.12
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• pp.214-221
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• 2008

Terrestrial magnetism has left traces through residues such as fossils of the terrestrial magnetism as time went by. An analysis of archaeological terrestrial magnetism is an estimation of dates of archaeological remains where baked earth is exposed by measuring the change of the past terrestrial magnetism through thermo-remnant magnetization of baked earth. This paper attempts to apply an analysis of the archaeological terrestrial magnetism to archaeological remains using fourteen soil samples extracted from a charcoal kiln with side window located at the Area Ⅰ of Maegokdong. The date of A.D.440${\pm}$15 the analysis of archaeological terrestrial magnetism came up with gives solid evidence, while an archeological chronicle used arrangements of surrounding artifacts because of the absence of remains and assumed uncertainly that a charcoal kiln with side window was from the three kingdom periods. This analysis of archaeological terrestrial magnetism has come to anchor as a main natural scientific analysis because it relatively easily removes pollutants and comes up with highly reliable results owing to its considerably narrow error tolerance of assumed dates.

• Proceedings of the Korean Society of Propulsion Engineers Conference
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• v.y2005m4
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• pp.309-312
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• 2005

High altitude ignition test was performed to understand high altitude ignition characteristics of slinger combustor. To verify ignition limits, test was carried out with variation of altitude and fuel nozzle rotational speed using AETF(Altitude Engine Test Facility) in KARI(Korea Aerospace Research Institute). From the result, the effect of major factors which affect on ignition characteristics was observed. The reduction of ignition limit with increasing altitude and expansion of ignition limit with increasing rotational speed of fuel nozzle was verified. Also minimum rotational speed of fuel nozzle at high altitude must be greater than that of seal level condition.

• Journal of Korean Society of Archives and Records Management
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• v.18 no.2
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• pp.1-28
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• 2018

Because archaeological artifacts are often destroyed during physical excavation, the data archaeologists gather in the field is rich with research potential. Few in Korea have paid attention to digital archives for archaeological data or argued for their development. This paper considers the significance and necessity of archaeological data and digital archives for its preservation and access. It also raises awareness of the need to develop a Korean national archaeological data digital archive. The paper first overviews the nature of the archaeological discipline, data, and digital archives. Then it investigates well-known, global cases involving digital archiving of archaeological data. Based on these foundations, the paper discusses principal and prior challenges to developing a Korean national archaeological data digital archive.

• The Journal of the Korea institute of electronic communication sciences
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• v.17 no.3
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• pp.433-440
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• 2022

High Altitude Long Endurance(HALE) solar powered UAV is the vehicle that flies for a long time as solar power energy sources. It can be used to replace satellites or provide continuous service because it can perform long-term missions at high altitudes. Due to the property of the mission, it is very important for HALE solar powered UAV to have maximum flight time. It is required for mission performance to fly at high altitudes continuously except a return for temporary maintenance. Therefore mission availability time analysis is a critical factor in the commercialization of HALE solar powered UAV. In this paper, we presented an analytic model and logic for available time analysis based on the design parameters of HALE solar powered UAV. This model can be used to analyze the possibility of applying UAV according to the UAV's mission in concept design before the UAV detail design stage.

• Korean Journal of Heritage: History & Science
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• v.53 no.3
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• pp.184-201
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• 2020

After the liberation of Korea from Japanese colonialism, archeology in South and North Korea took different paths. In particular, archeology in South and North Korea began to show great differences from the 1970s, when the former experienced rapid academic advancement following the evacuation of large-scale relics and the latter began to demonstrate a drastically political nature. North Korea declared 'Daedonggang Culture' in the 1990s, and South and North Korean archeology subsequently became so divorced that the two shared almost no common ideas. This kind of discrepancy is now particularly prominent with regard to the Bronze Age and Iron Age around "Gojoseon". Researchers of prehistoric archeology in South Korea have no choice but to keep referring to North Korean archeology. This is because North Korean resources are the main research subjects for identifying "the origin and descent of culture", which is still one of the most important research topics. However, people cast doubt on their reliability. Such a "two-fold viewpoint" demonstrates how those associated with South Korean archeology perceive their counterparts in North Korea. A large part of the visible "gap" between South and North Korea in terms of Bronze Age archeology comes from "political difference" that cannot be resolved by an increase in survey cases or academic debate. However, examining the trend in prehistoric archeology in North Korea is not aimed at criticizing the political nature of North Korean archeology. The goal is to investigate how the North Korean perspective on the Bronze Age differs from that in South Korea at present and to examine the potential problems in explaining "prehistoric culture in the Korean peninsula" and, furthermore, prehistoric culture in Northeast Asia, by including North Korean resources. This paper examines how Bronze Age-related research trends have evolved in North Korea to date and compares them with those seen in South Korean archeology during the same period.

• Korean Journal of Heritage: History & Science
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• v.54 no.3
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• pp.106-125
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• 2021

This paper presents several reasons for the necessity of archaeological hands-on training and strategies for its implementation. First, it is necessary to produce a specialized manual for local cultural heritage education that can enhance the specialization and educational effectiveness of archaeological experience education. In addition, in order to secure professionalism in hands-on education and conduct it systematically, the ability of instructors to conduct education is important, so instructor competence reinforcement education needs to be conducted regularly. In addition, hands-on education needs a strategy of planning and content development of archaeological education programs, with consideration given to the subjects of learning, and the establishment of a cooperative network. It is time to cooperate with various experts to establish an education system necessary for cultural heritage education in the region and develop customized content for local archaeological heritage supplementary textbooks. Finally, due to Covid-19, we agonized over effective education plans for online archaeological heritage education, which requires active interaction class design and a strategy to promote interaction between professors and learners. In addition, such archaeological heritage education should be compatible with the goal of providing customized lifelong education.